{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical", "Disease"], "input": "The author postulates that in cases of ethambutol associated chiasmopathy , ethambutol may initially affect the optic nerves and subsequently progress to involve the optic chiasm ."}
{"Chemical": ["ethambutol"], "Disease": []}